Notes for students in chemistry : being a syllabus of chemistry compiled mainly from the manuals of Fownes-Watts, Miller, Wurz, and Schorlemmer / by Albert James Bernays.

  • Bernays, Albert James, 1823-1892.
Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: Notes for students in chemistry : being a syllabus of chemistry compiled mainly from the manuals of Fownes-Watts, Miller, Wurz, and Schorlemmer / by Albert James Bernays. Source: Wellcome Collection.

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    RADICLES. TABLE OF ATOMIC WEIGHTS. tetrad Curbnn, the saturated liydrogen cnmpound is known as siETHANE CH^; the removal of one atom of liydrogen, leaves a residue known as jiethtl CH3. A furtlier removal of an atom of hydrogen, leaves a bivalent r idicle methene CH,„ If we take away three atoms of liydroiren from methane Cllj, we obtain tlie trivalent radicle metiientl CH. Lastly, when all the hydrogen is removed, we have the tetrad Carbon remaining. So likewise with the siiturided molecuKi hydrogen oxide or water OH.^; take away an atom of hydrogen, and we have a monad radicle hydroxyi, OH, analogous to chlorine, &e. Tlie atomic weight of an element is, then, in some cases identical with its equivalent; in other cases equal to two, three, four, five times, &c., its equivalent weight. In other words, one atom of an element may displace or be substi- tuted for r, 2, 5, 4, 5, 6 atoms of hydrogen. This difierence in comljining or satui-atiug power is called Atomicity or Quanti- valence. The elements are 64 in number, and may be arringed ac- cording to their quantivalence. They are either monads, dyads, triads, tetrads, pentads, or hexads; either nnivalent, bivalent, trivalent, quadrivalent, quinquivalent or sexvalent. Elements of even equivalency are called artiads ; of uneven, perissads. Alpjiabetical Table of the Elements, Symbols, and Atomic Weights. Aluminum Al 27 .5 Gallium Ga 68 Argentum Ag 108 Glucinum G 9 .3 Arsenicum As 75 Hydrargyrum Hg 200 Aurum Au 196, 6 Hydrogenium H 1 Barium Ba 137 Iodine I 127 BisTiuth. Bi 210 Indium In 113 .4 Boron B 11 Iridium Ir 198 Bromine Br 80 Kalium K 39, ,1 Cadmium Cd 112 Lanthanum La 139 Caesium Cs 133 Lithium L 7 Calcium Ca 40 Magnes um Mg 24 Carbon C 12 Manganesium Ma 55 Cerium Ce 138 Molybdenum Mo 96 Chlorine CI 35. 5 Natrium Wa 23 Chromium Cr 52. 2 Nickel Ni 58. 8 Cobalt Co 58. 8 Niobium Nb 94 Cuprum Cu 63. 4 Osmium Os 1!J9 Didymium D 144. 75 Oxygenium 0 16 Erbium E 168. 9 Palladium Pd 106. 5 Ferrum Fe 56 Phosphorus P 31 Fluorine F 19 Platinum Pt 197. 1 B 2